Motor-winding crank.



A: M. EWART MOTOR WINDING CRANK, nnrucmou FILE-ID AP 19. 1911.

Patented Aug. 28, 1917.

iNVENTOR ATTNES- ARCHIBALD M. E'WART, F BARBERTON, OHIO.

TMOTOB-WINDING CRANK.

Specification of Letters Patent.

Patented Aug. 28, 1917.

Application filed April 19, 1917. Serial No. 163,130.

To all whom it may concern:

Be it known that I, ARCHIBALD M. EWART, residing at Barberton, in the county of Summit and State of Ohio have invented a new and Improved Motor-Winding Crank, of which the following is a specification.

My invention has reference to improvements in winding cranks for talking inachines and it primarily has for its object to provide an improved construction of crank mechanism of the character stated in which is included a safety device'designed for preventing the over winding of the spring and the straining and breaking of the said spring.

My invention also has for its purpose to provide a cranking mechanism of a simple and economical construction, in which the parts are especially designed for being readily applied for use on all classes of talking machines, that can be applied without any material change-in the usual way of connecting the winding crank to the motor spring shaft, which can be bodily removed from the motor and the talking machine casing, so that the motor may be elevated for oiling and adjusting, and which eiiectively serves its intended purpose.

lVith other objects in view and hereinafter explained, my invention embodies the peculiar construction, and combination of parts set out in the following description, specifically pointed out inthe appended claims, and illustrated in the accompanying drawing, in which:

Figure lis a plan view ofmy spring motor winding crank mechanism.

Fig. 2 is a longitudinal section thereof.

Fig. 3 is a plan view of a portion thereof and illustrates the manner it is withdrawn the clamp nut that cooperates therewith.

In the practical application of my invention, 1 form the aperture 1, in the side wall 1 of the casing, with oppositely disposed lateral extensions 1 the reason for which will presently appear, and mount within the said aperture a hub-like bearing 2, formed on an escutcheon plate 20 secured to the side of the casing by machine screws 21 which engage threaded apertlu'es 22 in a plate 23 secured to theinn'er side of the casing, as shown.

3 indicates a plug formed with an externally threaded end 30 that screws into the threaded socket 231 in the motor spring shaft to which the motor springs ll are secured in the usual way.

5 designates a sleeve that includes a hub portion 50 formed with an internally threaded portion 51 for receiving the thread ed end of the crank handle 6, and the said hub portion 50 has a collar 52 for bearing against the inner end of the hub bearing 2, as is clearly shown in Fig. 2, by reference to which it will also be seen sleeve 5 includes a long externally threaded bearing 53 on which is mounted an adjusting nut and a jam nut 8, the outer end of the adjusting nut hating a socket 71, as shown. 9 represents a steel shaft, one end of which extends into sleeve 5 and is made fast to the said sleeve by a cotter pin 10 that passes through the hub end of the sleeve and the shaft 9.

The outer clutch member 11 has an end socket for slipping onto the plug 3 that is attached to the spring motor shaft and diametrically oppositely elongated slots 13-13 for receiving the ends of a cross pin 33 on the outer end of the plug, as shown.

In the present form the clutch members 11 and 12 are of the male and female cone type, the member 11 having a coniform socket 11 to receive the cone shaped end 12 of the member 12 and the member 12 has elongated slots 14 to receive the cotter pin '15 which passes through the shaft 9.

lfiindicates a coil tension spring mounted on the crank shaft, one end of which seats in the socket 71 of the adjusting nut 8 and the other end seats in a like socket 17 on the inner end of the clutch member 12.

The outer end of shaft 9 has a head portion 90 that prevents the clutch members -1112 slipping beyond the inner end of the said shaft -when adjusting the parts to the operative position.

' By-providing 'a long bearing sleeve mountit were, a fixed part of the spring motor shaft, a substantially rigid mounting is provided, for the operating parts, which, when the escutcheon with its hub is removed from the casing, may be bodily pulledout t-hroughthe casing side, by holding the same with the cotter pins in position to aline the laterailextensions of the aperture in thecasmg d and are asreadily shoved back through the said'aperture to connect with the plug bar 3,

It is'obvious that by cooperatively combining the several parts that constitute the I operating mechanlsm, in the manner shown andidcscribed, the entire mechanism can be conveniently disconnected from the motor,

when it is desired to elevate the motor for oiling, and can be as readily reapplied when the motor is put back in the operative position.

.The tension on the slip clutch members :1112. can befreadily adjusted to sult the desired requirements by proper adjustment My construction of crank mechanism is such'that it is adapted for use on all classes "members are assembled in the operative p0 sition, they form a part of the winding hanidle oftalking machines and whenthe clutch The crank handle proper can be removed at any time without removing the other cooperative parts, by simply unscrewing it from the head end of the sleeve.

This application is for a modification and rovement on the construction shown in vmy Patent #1,232,779, issued July 10, 1917,

and in this application make no generic claimto the structure whlch is shown that patent,

- From the foregoing description taken in connection with the accompanying drawing,

it is thought'the complete construction, operation and advantages of my invention will be readily. understood by those skilled the art. What I claim is: .1. A Winding crank mechanism for talking machines comprising a crank shaft, two

elements of a'clutch member mounted on said crank shaft, one of said elements being 7 free to turn on the crank shaft, the other of said elements having longitudinal mot1on on the crank shaft, means for keying said other element against turning on the crank shaft, a spring device for holding said v clutch elements in clutching engagement,

said first clutch element having provision for connecting with the spring motor of the talking machine, said clutchtelements havmg male and female cone clutching sur faces.

2. A winding crank mechanism for talk ing-machines comprising a crank shaft, two

elements of a clutch member mounted on said crank shaft, one of said elements being free to turn on the crank shaft, the other of said elements having longitudinal motion on the crank shaft, means for keying said other element against turning on the crank shaft,

a spring device for holding said clutch ele-- mentsin clutching engagement, said first ARCHIIIBALD M. EWART. 

